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9.3 Table of troubleshooting messages
Problem
Possible cause
Potential remedies
Cleared by
Incorrect time
Incorrect time saved in the
controller.
Set the correct time
(
section
Commissioning
).
Operator
Operator
Oven does not start
automatically
Power failure or interruption. Check the mains connection
for proper function.
If necessary, contact a
qualified electrician.
No display, power
indicator is lit, level LEDs
not lit when turning on
the unit
Defective protective fuse.
Turn off the unit, wait 10
seconds, then turn the unit
back on.
If the problem recurs, contact a
service technician.
No display, power
indicator is not lit
Unit has no power.
Check sites fuses and mains
cable.
If necessary, contact a
qualified electrician.
Display shows “Safety
Shutdown”
Oven temperature is above
1,650°C.
Turn off the furnace and allow
to cool.
If the problem recurs, contact a
service technician.
Door panel exhibits
broken bits or other
damage
Door panel has been
handled improperly.
Replace door panel.
Display shows
“ <-> -”
Oven interior is noticeably
cooler than room
temperature.
Oven door open to allow
chamber interior to warm to
room temperature.
Incorrect polarity/connection
of heating element
Adjust polarity/connection of
the heating element.
Qualified
electrician,
service
technician
Display shows “Sensor
defective”
Defective heat sensor.
Replace heat sensor.
Heat sensor connections
are loose.
Tighten heat sensor
connections.
Heating programs and
time are not saved
permanently
Controller defective.
Replace controller.
No display, power
indicator is lit, level LEDs
lit briefly when turning on
the unit
Defective display.
Replace controller.
Level LED flashes, but
furnace does not heat.
Defective heater.
Check heater for proper heat
production.
Replace heating chamber.
Furnace trips building-
side RCD
Defective heater.
Check heater for proper heat
production.
Replace heating chamber.
